Infiltration of a fibrous structure comprising a liquid silicon reactive layer

A process for manufacturing a ceramic matrix composite part, comprising:

• infiltrating a pre-densified fibrous structure with a molten infiltration composition comprising silicon, in order to form a ceramic matrix in a residual porosity of the pre-densified fibrous structure, said pre-densified fibrous structure comprising a pre-densification matrix comprising a first silicon carbide layer, a reactive layer comprising a reactive material that contains carbon and is capable of reacting with the silicon in the infiltration composition, the reactive layer covering the first layer, and a molten silicon wetting layer that is made of silicon carbide and covers the reactive layer,
• wherein the pre-densified fibrous structure comprises a fibrous reinforcement formed by three-dimensional weaving.